package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;

import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;

import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;


import java.util.Collections;
import java.util.List;
import java.util.Set;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void addSetmeal(SetmealDTO setmealDTO) {
        Setmeal setmeal = Setmeal.builder().build();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        // 插入套餐表
        setmealMapper.insert(setmeal);

        Long setmealId = setmeal.getId();

        // 批量插入套餐-菜品表
        List<SetmealDish> setmealDishList = setmealDTO.getSetmealDishes();
        setmealDishList.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        setmealDishMapper.insertBatch(setmealDishList);

    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageList(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> setmealPage = setmealMapper.selectPage(setmealPageQueryDTO);
        return new PageResult(setmealPage.getTotal(),setmealPage.getResult());
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        // 起售中的套餐不能删除
        ids.forEach(id->{
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
        setmealMapper.deleteByIds(ids);
        setmealDishMapper.deleteBySetmealIds(ids);
    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    @Override
    public SetmealVO getSetmealWithDishesById(Long id) {
        Setmeal setmeal = setmealMapper.getById(id);
        List<SetmealDish> setmealDishList = setmealDishMapper.getBySetmealId(id);
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishList);
        return setmealVO;
    }


    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void updateSetmeal(SetmealDTO setmealDTO) {
        // 修改套餐表
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.update(setmeal);

        // 修改套餐-菜品表
        List<SetmealDish> setmealDishList = setmealDTO.getSetmealDishes();
        setmealDishMapper.deleteBySetmealIds(Collections.singletonList(setmealDTO.getId()));
        setmealDishList.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealDTO.getId());
        });
        setmealDishMapper.insertBatch(setmealDishList);
    }


    /**
     * 起停售套餐
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        // 包含停售菜品的套餐不能起售
        if(status == StatusConstant.ENABLE){
            List<Dish> dishList = dishMapper.selectBySetmealId(id);
            dishList.forEach(dish -> {
                if(dish.getStatus() == StatusConstant.DISABLE){
                    throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                }
            });
        }
        Setmeal setmeal = Setmeal.builder().id(id).status(status).build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

}
